"use strict";
(() => {
    let a = 0;
    let i = 0;
    let arr = [1, 2, 1, 21, 21, 54, 12, 0, 1, 2];
    let arr1 = [];
    // let a1 = new Set(arr);
    let a1 = arr.sort((a, b) => a - b);
    let a2 = new Set(a1);
    console.log(a2);
})();
